@article{JEMS_2013_15_1_a7,
     author = {Massimiliano Berti and Philippe Bolle},
     title = {Quasi-periodic solutions with {Sobolev} regularity of {NLS} on $\mathbb T^d$ with a multiplicative potential},
     journal = {Journal of the European Mathematical Society},
     pages = {229--286},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2013},
     doi = {10.4171/jems/361},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/361/}
}